<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category  Zend
 * @package   Zend_Validate
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 * @version   $Id: ExcludeExtension.php 16971 2009-07-22 18:05:45Z mikaelkael $
 */

/**
 * @see Zend_Validate_Abstract
 */
require_once 'Zend/Validate/File/Extension.php';

/**
 * Validator for the excluding file extensions
 *
 * @category  Zend
 * @package   Zend_Validate
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Validate_File_ExcludeExtension extends Zend_Validate_File_Extension
{
	/**
	 * @const string Error constants
	 */
	const FALSE_EXTENSION = 'fileExcludeExtensionFalse';
	const NOT_FOUND       = 'fileExcludeExtensionNotFound';

	/**
	 * @var array Error message templates
	 */
	protected $_messageTemplates = array(
	self::FALSE_EXTENSION => "The file '%value%' has a false extension",
	self::NOT_FOUND       => "The file '%value%' was not found"
	);

	/**
	 * Defined by Zend_Validate_Interface
	 *
	 * Returns true if and only if the fileextension of $value is not included in the
	 * set extension list
	 *
	 * @param  string  $value Real file to check for extension
	 * @param  array   $file  File data from Zend_File_Transfer
	 * @return boolean
	 */
	public function isValid($value, $file = null)
	{
		// Is file readable ?
		require_once 'Zend/Loader.php';
		if (!Zend_Loader::isReadable($value)) {
			return $this->_throw($file, self::NOT_FOUND);
		}

		if ($file !== null) {
			$info['extension'] = substr($file['name'], strrpos($file['name'], '.') + 1);
		} else {
			$info = pathinfo($value);
		}

		$extensions = $this->getExtension();

		if ($this->_case and (!in_array($info['extension'], $extensions))) {
			return true;
		} else if (!$this->_case) {
			$found = false;
			foreach ($extensions as $extension) {
				if (strtolower($extension) == strtolower($info['extension'])) {
					$found = true;
				}
			}

			if (!$found) {
				return true;
			}
		}

		return $this->_throw($file, self::FALSE_EXTENSION);
	}
}
